If simple interest for 2 years for a sum is TK. 600 and compound interest for the same sum for 2 years and the same rate of interest is TK. 645, what will be the rate of interest?

A principal amount of TK. 5000 earns TK. 1500 in 5 years. What is the rate of interest per annum?

An amount of TK. 4500 is invested at a simple interest rate of 12% per annum. If the interest earned is TK. 2160, how many years was the money invested?

A sum of money triples itself in 10 years at simple interest. What is the rate of interest per annum?

If TK. 1200 is invested for 5 years at a rate of 8%, what will be the total amount after the investment period?

A sum of money at simple interest amounts to 815 in 3 years and to 854 in 4 years. The sum is:

If TK. 3500 is invested at 6% simple interest per annum and the total interest earned is TK. 840, for how many years was the money invested?

A sum of TK. 2500 grows to TK. 3250 in 5 years at simple interest. What is the rate of interest?

A certain amount of money amounts to TK. 7200 in 3 years at 10% per annum. What is the principal amount?

If a sum of TK. 4500 amounts to TK. 5400 in 3 years at simple interest, what is the rate of interest?